Question

A force does 128-J of work on a 4-kg cart. What mus be the velocity of the cart?

Answer 1

v = 8[m/s]

Step-by-step explanation:

In this case, the work that is exerted on the cart is the kinetic energy that allows the movement, so we can use the following equation of kinetic energy.

`E_(kin)=Work\\E_(kin)=(1)/(2) *m*v^(2)`

Now replacing:

`128=0.5*4*v^(2) \\v=√(64) \\v=8[m/s]`